Decorative extrusion



FIG. 1 is a front elevational view of the decorative extrusion showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a right-side elevational view thereof; and

FIG. 4 is a top plan view thereof.

The left side elevational view is substantially similar to the right side elevational view illustrated. 

The ornamental design for a decorative extrusion, as shown and described. 